Use coffee-rails master to run the build for now
Merge pull request #11000 from sbeckeriv/accept_header

Fix undefined method `ref' for nil:NilClass for bad accept headers

Conflicts:
	actionpack/CHANGELOG.md
Merge pull request #10774 from chuckbergeron/validates-inclusion-of-accuracy-for-non-numeric-ranges

Greater accuracy for validates_inclusion_of on non-numeric ranges

Conflicts:
	activemodel/CHANGELOG.md